ExoAtlas Documentation
Guides and reference material for ExoAtlas apps. Today the library covers the Orbit Visualizer — task-focused how-tos plus a shared concepts section on TLEs, propagation models, and orbital elements. Documentation for other ExoAtlas apps will be added here as it is written.
Orbit Visualizer
Build, propagate, analyze, and share Earth orbits in the browser. These guides walk through the app's workflows step by step.
Your first orbit
Load a real satellite from the catalog and see its ground track — in about 60 seconds.
Ground sites & access
Define a ground station and predict passes: AOS, LOS, duration, max elevation, azimuths.
URL API
Every query parameter the app accepts — deep-link orbits, catalog presets, and full scenarios.
All Orbit Visualizer documentation →
Concepts
App-agnostic background: the formats, models, and frames the apps are built on. Written once, shared by every ExoAtlas app.
How to read a TLE
Field-by-field anatomy of the two-line element format, epoch age, and where TLEs come from.
Propagation models
What two-body, J2 secular, and SGP4/SDP4 each model and omit — and when each is appropriate.